Properties of MR™
Thin and Light
Lenses generally become thicker and heavier as optical power increases. But with the development of high R.I. lens materials, it’s now possible to make thinner, lighter lenses.
Now, even high-power lenses can be made thin and comfortable to wear.
Safe and Resistant to Breakage
The toughness of thiourethane resin makes it possible to build thin eyeglass lenses with high impact resistance. Thiourethane lenses resist breaking and chipping, even for two-point or rimless glasses, making them safer to wear and use. Thiourethane lenses also exhibit superior workability, which means they can be formed into virtually any design.
Thiourethane lenses feature high wear resistance and resist discoloring over time.
They also allow stronger adhesion of the coating material to the surface. The coatings are more resistant to peeling, even after extended use.
Due to the prism effect, which disperses light passing through a lens, color fringing (chromatic aberration) typically becomes more evident in the view as the optical power of a lens increases.
Lens materials with high Abbe numbers,* like MR-8™, can minimize chromatic aberration.
*The Abbe number is an index associated with chromatic aberration.
MR™: Advancing eyeglass lenses to a whole new level
Enabling More Precise Lens Designs
Due to the high workability of thiourethane MR™, it’s ideal for use in lenses that require precise design.
Lens suited for MR™
Unlike monofocal lenses, which are made to a single optical power, a progressive lens has a seamless and continuous progression of optical powers. If users experience difficulty in viewing objects both near and far due to presbyopia, a single pair of glasses can provide comfortable coverage of points at all distances.
The common spherical lens tends to produce distortions in the visual periphery. An aspherical lens, on the other hand, has specially-curved surfaces to reduce distortion.
Easier Manufacturing of Highly Functional Lenses
MR™ is manufactured from a unique monomer polymerization process that make it possible to add functions like control of specific wavelengths or photochromic properties by blending special dyes. Highly compatible with coating materials and film, the material also makes it easier to manufacture highly functional polarized lenses.
MR™-based functional lens materials
Lens Makers Who Have Adopted MR™
MR™ lenses have been manufactured by a number of lens makers around the world, including the following: